Oven.



K. WEBB.

l OVEN. APPLIOATION FILED NOV. 17, 1910.

Patented Dec. 16,v 1913. fhg. 3.

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"UNTTED STATES PATENT @FFTQEQ KATE WEBB, OF WEST CONSHOHCKEN, PENNSYLVANIA.

OVEN.

resinas.

Application led November 17, 1910.

To @ZZ whom t may concern.'

Be it known that I, KATE 7WEBB, a citizen of the United States, and a resident of West Conshohocken, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Ovens, of which the following is a full, clear, and exact disclosure.

The main obje-cts of this invention are to provide in an oven an improved rotary bottom, to provide for use in an oven a false rotary bottom in combination with a false fixed bottom; to provide an oven with an improved false rotary bottom in combination with means for rotating the same which is adapted to be built into and to form a permanent feature of any oven, and which is also adapted to be constructed as aseparate portable device which may be inserted into any oven of suitable size; and to provide other improvements as will appear hereinafter.

In the accompanying drawing Figure 1 is a vertical central section of a stove provided with an oven constructed in accordance with this invention; Fig. 2 a horizontal section on lines 2 2 of Fig. 1 looking in the direction of the arrows; Fig. 3 a horizontal section on lines 3 3 of Fig. 1 looking in the direction of the arrows; Fig. 4c a central vertical section of a modified form of this invention and Fig. 5 a fragmentary bottom view of Fig. 4.

Referring to the drawings, particularly to Figs. 1 and 3, one embodiment of this invention is shown in a stove having an exterior casing 1 of cast iron or sheet metal of the usual rectangular form. A solid horizontal partition 2 extends across the interior of the casing 1 and forms a fixed bottom for an oven 3. This fixed bottom is supported on suitable flanges t projecting inwardly from the casing 1 and rigid or integral therewith, or the fixed bottom may be secured to the casing in any other suitable way.

Below the fixed bottom 2 and within the casing 1 is the usual horizontal grate 5 for supporting fuel. Leading from the combustion chamber 6 above the grate 5 is the usual flue or smoke stack 7. The space in the casing 1 below the grate 5 forms the usual ash pit l0. The usual doors 11 and l2 are provided on the front of the stove covering openings into the combustion chamber 6 and ash pit 10, respectively.

Specification of Letters Patent.

Patented Dec. 16, i913. serial No. 592,806.

Arranged within the oven above the fixed bottom 2 is a false rotary circular bottom 15 of cast iron or other suitable material. rThis false rotary bottom is preferably perforated as at 15 with numerous openings to permit of the passage of heat and preferably has a fiat horizontal upper surface. For supporting this false rotary bottom to rotate upon a fixed vertical axis, a short vertical spindle 16 is fixed at its upper end axially in the rotary bottom and projects downwardly therefrom. The lower end of this spindle is preferably conical in shape and engages in a conical bearing 17, provided therefor in the fixed bottom 2 of the oven.

Ball bearings 18 may be provided between the fixed bottom 2 and the false rotary bottom 15, an annular raceway 19 being provided in the false rotary bottom, for this purpose.

The peripheral edge 2O of the false rotary bott-om 15 is preferably beveled, converging upwardly and is snugly but rotatably surrounded by a false fixed annular bottom 25, of cast iron or other suitable material which isl preferably perforated as at 26 and is fixedly secured to the casing 1. The interior edge of this annular bottom is beveled to correspond with the beveled or peripheral edge of the rotary bottom and maintains the rotary bottom in horizontal position. This false fixed bottom covers all of the space between the rotary bottom and the sides of the casing 1 and has an upper surface, preferably fiat and flush with the upper surface of the rotary bottom..

For rotating` the rotary bottom 15, any suit-able means may be used, for instance, the rotary bottom may be provided upon its under side with an annular beveled gear or rack 30, and a corresponding beveled pinion 31 may be fixed on the inner end of the horizontal spindle 32 which extends rotatably through the front of the casing 1 in a suitable bearing 33, the outer end of the spindle 32 being provided with a crank 34, rigidly connected thereto and having a handle 35 whereby the crank may be rotated manually to rotate the rotary bottom 15.

The oven 3 is provided with the usual opening 36 in its front wall and with the usual door 37 to close the opening. The lower edge of the opening 36 is preferably flush with the false fixed bottom 25.

By the above described construction the fioor of the oven formed by the false fixed bottom and the false rotary bottom is flat throughout the entire extent of its upper surface, and has all the advantage in this respect of the ordinary fixed bottom generally found in ovens, at the same time having all the advantages that are found in the rotary feature. By having a fixed solid bottom beneath the false rotary bottom, the gases of combustion are prevented from leaking into the oven, and by having the false rotary bottom and the false fixed bottom perforated the heat arising from the combustion chamber is permitted to be freely conducted into the oven.

Instead of being applied to a construction built into a stove as a permanent partv thereof, as above described, this invention may be applied in a modified form to provide a portable rotary false bottom which may be readily inserted into any oven of suitable size. In this modified form of the invention shown in Figs. 4 and 5 a rotary circular false bottom 40 constructed as heretofore described, with a central downward projecting spindle 41, is surrounded by a rectangular frame 42, the upper portion of which extends inwardly in the form of a false fixed bottom 43 corresponding to the false xed bottom heretofore described, the peripheral edge of the false rotary bottom being beveled and the corresponding edge of the false fixed bottom being correspondingly beveled as heretofore described.

For rotatably supporting the false rotary bottom 40, a hub 45 is arranged centrally of the frame 42, beneath the false rotary bottom and is connected tQ the frame 42 by means of radial ribs 46, the lower surface of the hub and ribs being entirely above the lower edge of the frame 42. Ball bearings 47 may be inserted as heretofore described, between the hub 45 and the false rotary bottom 40. For rotating this false rotary bottom an annular beveled gear 50 may be fixed as heretofore described on the under side of the false rotary bottom and a beveled pinion 5l meshing with this annular gear may be fixed on a spindle 52 rotatably mounted in a suitable bearing 58 in one side of the frame 42. The outer end of this spindle 52 may be squared as at 54 to receive a removable socket crank 55 whereby the spindle may be rotated. In operation this portable false rotary bottom is arranged in the oven so that the spindle 52 projects outwardly and terminates just within the door of the oven so that the door may be closed over the whole device, the socket crank being removed. When the door is open-ed, the socket crank may be applied to the spindle 52 to rotate the false bottom. It is to be understood that this portable device may be made in various sizes to fit various sizes of ovens.V

Although only two forms have been described in which this invention may be embodied, it is to be understood that the invention might be applied in other forms to meet various conditions and thatthe details of construction herein described might be varied without departing from the spirit of this invention or the scope of the appended claims.

Having thus fully described this invention, I claim and desire to protect by Letters Patent of the United States:

l. In a stove, the combination with an exterior casing, of a substantially horizontal imperforate partition arranged within said casing and forming the upper wall of a combustion chamber and the bottom of an oven, and a rotary false bottom arranged within said oven and carried by said partition.

2. In a stove, the combination with an exterior casing, of a substantially horizontal imperforate partition arranged within said casing and forming the upper wall ofv a combustion chamber and the bottom of an oven,

and a rotary false bottom arranged within.

said oven and spaced above and carried by said partition.

3. In a stove, the combination with an eX- terior casing, of an imperforate partition arranged within said casing and forming the top wall of a combustion chamber and the bottom of an oven, a substantially horizontal rotary false bottom arranged within and spaced above said first-mentioned bottom, and means arranged between said bottoms for rotating said false bottom.

4. In a stove, the combination with an exterior casing, of a substantially horizontal imperforate partition within said casing and forming the top wall of a combustion chamber and the bottom of an oven, and arranged to prevent gases from passing from the combustion chamber into the oven, a stationary false bottom within said oven spaced above said firstl mentioned bottom and provided with a circular opening, and a rotary false bottom arranged within said opening and carried by said first mentioned bottom.

5. In a stove, the combination with an exterior casing, of a substantially horizontal imperforate partition within said casing and forming the top wall of a combustion chamber and the bottom of an oven, and arranged to prevent gases from passing from the cornbustion chamber into the oven, a stationary false bottom within said oven and spaced above said firstI mentioned bottom and provided with a circular opening, and a rotary false bottom arranged within said opening and carried by said first mentioned bottom` and means arranged between said bottoms for rotating said rotary bottom.

6. In a stove, the combination with an ex- Y Within said oven and spaced above said first mentioned bottom and provided with a circular aperture and having a substantially flat horizontal upper surface, and a rotary circular false bottom arranged in said aperture and having a flat upper surface substantially flush with said first mentioned fiat surface, said false rotary bot-tom being provided with a plurality of perforations and being carried by said rst mentioned l0 bottom.

In Witness whereof, I have hereunto set my hand this 11 day of November A. D.

KATE WEBB. Witnesses:

A. I. GARDNER, ALEXANDER PARK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

